Adjusting an infrared (IR) sensor typically involves calibrating it for object detection using a potentiometer. This process ensures the sensor accurately detects objects within a specified range.
Calibration Procedure for Object Detection
Here's a step-by-step guide on how to calibrate an IR sensor for object detection, based on the provided reference:
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Positioning: Place the IR sensor facing a wall approximately 2 feet away.
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Initial Adjustment: Turn the potentiometer on the sensor fully clockwise. This sets the sensor to its maximum sensitivity.
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Fine-Tuning:
- Slowly rotate the potentiometer counterclockwise until the signal LED on the sensor just turns off. This indicates that the sensor is no longer detecting the wall at 2 feet.
- The sensor is now calibrated to detect objects closer than a certain distance. In this configuration, the signal LED should activate when an object is placed less than approximately 9 inches away.
Example:
| Step | Action | Expected Result |
|---|---|---|
| 1. Placement | Point sensor at a wall 2 feet away | Sensor detects the wall. |
| 2. Potentiometer (Clockwise) | Turn potentiometer fully clockwise. | Sensor sensitivity at maximum. |
| 3. Potentiometer (Counter) | Slowly turn counterclockwise until signal LED turns OFF | Sensor no longer detects the wall at 2 feet. |
| 4. Object Detection | Place object less than 9 inches away | Signal LED turns ON, indicating object detection within calibrated range. |
Practical Insights:
- The potentiometer is crucial for adjusting the detection range of the IR sensor.
- The signal LED provides a visual indication of whether an object is detected within the calibrated range.
- This calibration process is specific to object detection; other applications might require different adjustment methods.
